Well, let's go:

- The sources were detached to a separated file, so that we can track them more
  easily.
  - Indeed some files came from Alpine Linux aports repo, however they borrowed
    from NetBSD; ideally we should pick them from their origins.
- The sources are treated as packages, with pname, version and src well-defined.

- The usage of null as default is too error-prone, as demonstrated by an old
  Emacs refactor we did.
  - I have grepped the Nixpkgs and I have not found references that nullified
    linuxHeaders.
- finalAttrs design pattern
- SRI hashes
- Use `output*` variables
- strictDeps
- env vars inside env
- Remove comments from Bash code
  - Bash is to assembly as Nix is to Haskell.
    Bash is plumbing, and comments inside it has few to no value; indeed they
    have negative value, given that they are no-ops *and* cause mass rebuilds.
  - A more or less elegant solution employed by our Emacs expression is to
    concatenate strings.
- use pushd/popd instead of subshell
- passthru
- meta:
  - get rid of nested with
  - longDescription

Phew!